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Auto blog

Auto critic calls out Corvette, Mustang and Cherokee faithful

Most automotive purists fear change, but not without reason. Change, after all, did kill big-block V8s, along with most station wagons and manual transmissions. But change has also brought with it far more performance, safety and fuel economy - not to mention ridding the world of shag carpet interiors, bias-ply tires and those horrible motorized seatbelts of the early '90s.
By this time next year, the Chevy Corvette, Jeep Cherokee and next-generation Ford Mustang will all be on sale and will all, in some way, have angered or offended purists. To those critics, Mark Phelan of the Detroit Free Press is preemptively telling them to stop complaining - at least until they've all been driven. From the Corvette's square taillights and the Cherokee's radical nose to whatever pony car purists will harp on the 2015 Mustang for, Phelan's column points out the positives of automotive evolution and the negatives of staying the course for too long. That's fair enough, but do you think Phelan is on point, or all wet? Head on over to the Detroit Free Press to read his words, then have your say in Comments.

NHTSA closes probes on Jeep Grand Cherokee, Ford Freestar and Mercury Monterey

The Detroit News reports the National Highway Traffic Safety Administration has officially closed its investigations into 2012 Jeep Grand Cherokee, 2004-2005 Ford Freestar and Mercury Monterey models. The separate probes found no issues that pose safety concerns. NHTSA began investigating certain Grand Cherokee SUVs over complaints that power steering hoses could detach during operation, thereby increasing the risk of a vehicle fire. Of the 24 reports of failure, none alleged smoke or fire in the engine bay, and Chrysler has since modified the power steering cooler assembly to reduce the likelihood of the failure.
Meanwhile, certain Ford Freestar and Mercury Monterey vehicles garnered a government probe after receiving complaints that the models were equipped with faulty scissor jacks. The agency had received six reports of the jacks failing or causing injuries, including one incident that resulted in a fatality. But NHTSA says the jack failure rate is similar to those found in other vehicles. In those six cases, the government agency found the jacks were being used for something other than changing a tire, and investigators could not determine whether the emergency brake was set or the rear tires were properly chocked.

Watch this 650-hp Hennessey Jeep Grand Cherokee go from 0-60 in 3.9 seconds

Hennessey Performance Engineering has created an HPE650 package for the Jeep Grand Cherokee SRT fitted with the 6.4-liter Hemi engine. When it leaves the showroom floor it has 470 horsepower and gets from 0-60 miles per hour in 4.8 seconds. When it leaves Hennessey's garage floor after the upgrade it has 650 horsepower - 530 hp at the wheels, according to Hennessey - and gets to 60 mph in 3.9 seconds on its way to running the quarter-mile in 12.6 seconds.
There's more than just a Roots-type supercharger bolt-on, with ported cylinder heads and high-flow headers among the many changes made to the engine. You can watch this pre-2014 facelift silver model prove its spec sheet on the drag strip in the video below.